Gas-burner.



E. F. GWYN'N;

GAS BURNER.

APPLICATION FILED APRIL 1910.

i igg yg Patented Dec. -9, 1914.

2 SHEBTSSHBET 2.

WETNE SEEL NWZNTFS w EQ 3 q i n/MM orirrwio m Iii k a nomicaily used, 21116. new and novel means for thoroughly mixing iihe fuel and air be fore reaching the oombustion chamber.

A further object is to provide novel and eiiecibive HIERHS of reguiaimg the voiume of fuel. admitted to the air tube or mixing chamber without efiecting its velocity, and to feed the fuei into the burner prefersloiy' spirally or at any (lesired angle 20 the ion gi buriiual axis or radius of the air tube or mixing chamber The invention aiso provides for artificially mixing the air and fuel when the pressure on the fuei or the intensity of the clraft is not sufficient to accomplish the desired results, and for this purpose preferably steam or air anti-er yressure is discharged into the air tubeor mixing chamber through the 1 valve stem an piston which is employed the invention; Fig. tron through another form oil in the fuel tube for cout-ioiiing the volume of fuel admitted to the air tube or mixing chamber. This steam or compressed air is discharged preferably with a spiral or rotary motion but be discharged at any desireci angle is the lougituclinai axis or radius oi the air tube or mixing chamber.

"With the above and other objects in. View the invention. comprises a novel combination of parts so arranged as to secure a "periect mixture of the fuei and air, as hereiuafer more specificail r described em as iilustreated in the accompanying drawings.

in the drawings Fig re 3. is a longitudinal section ihrough one form of burner embody ing my in hentiou the sections the perforations being shown on the line 1l, Fig. Fig. 2 is a crosssection through the fuel tube on the line 2--2, Fig. 1; 3

and 4; are longitudinal sections through other forms of fuel tubes also embodying 5 is a longitudinal secourner embodyingihe invention; and 6 is a,

wise,

cros: section ii'lfmigii; tlie iuel tube on the line 6--- Fir. 5.

in Elie CiiilWi'i'UIS uiTS numeral Li indicates a suitable mixing tube, which be ar esireil shape in oross section, mail ireforahly tapers somewlme L arfl its neremi The outer end 3 i ercoi is lo iilie atmosphere for toiii in. the neceo sary amouu' of air. in

is located. liiifi tube ioecilecl iii 9 the gas as o ieuing borough the oi: tube. The outer end of means of cap ii through W. rod '5" of pisior. 3 which. ci iug such iaig 'i; fit therein no gas cm scope between i'foe same and the of the tube. 116 ro-i. 7 has threaded connection with the cup and its outer end is provided with o suitable hand Wheel 1) or other means for rotating the some to adjust the position oi. Lhe piston. The '6 also provided. wi 'li a stalling box 10 to prevent leakage oi; a

me mi '3 l-Ci'l. out the the i'i-uloo. havlaai? practically The arrangement oi. auci passages with reference to the piston 8 and iubo may vary considerably. As shown in Figs. 1 and 2, she inner end of fuel "tube 4: is practically close-cl, thereby feminine; a ohamber 36 Within said zulie in uclvaznoe of the piston, and the side walls of the tube are provided with a series of ports or perforations 12. These are preferably inclined not oniy in the plane of the axis of the tube, but also in the transverse plane of fills tube, so that they tend to gi e $0 the es a spiral oueward movement. The piseon 8 has a plain outer face am serves as adjus'miile ire burner, this ing {ICCOXIlPllSllBLi by s-Lcljusi iug the pisaon longitudinally in the tube and thus covering more or loci of the ports or perforations 12; as is appai'em. This adjustment, however, ofi'ececd in such manner that, the velocity of the gas passing through the uncovered ports or pcizioratioue o. Lg is closed byone to vary the volume of passing through il'ze though-the quantity of gas passing through the burner may vary. With a regulating valve placed, as referred to, in the gas supply pipe 5, the pressure and quantity of the gas supply through the ports or perforations varied when the regulating valve is moved.

Fig. 3 shows a modification wherein the inner end of thetube t is open and the tube itself is otherwise imperforate. In this case thegas ports or, passages are formed in the peripheral face of the piston 8, beingshown as.spiral grooves 14 which extend not entirely, across the face of said piston, there beingniportion 15 of the piston face at the outer sidmthereof which is not traversed by saidfiroovcs or passages. Inside of the tube tiswhushihg 16, whose outer end is beveled or inclined, as shown at 17. To vary the volume of gas with this form the piston 8 is ,adjustedso that the inclined edge 17 of bushing. 16 willexpose or, uncover the outer ends of more or less of the spiral grooves 14:. ,Fig. -shows a'modification of the arrangement shown in Fig. 3 wherein, instead of having grooves in the piston, the inner face of tube 4 is proveded with the spiral grooves .18, which begin at various points lengthwise of the tube, while the piston has .a. plain or ungrooved face, and having a tight fit in the tube, as inFig. 1. By adjusting the, piston'longitudinally in the tube the outer ends; of more or less of the grooves l8 are-uncovered, so as to yaiythe volume of gas but, without changing'its velocity.

Toinsu rethe drawing in and thorough mixingwith thegas of a sufficient supply of air in case therpressure of the gas falls so low as notto draw in a sufficient quantity of air, I provide means for discharging a fluid pressure medium into the air tube or mixing chamber. .As sh'ownin Fig.1, a supply pipe 520. for steam, compressed air, or other fluid pressure medium, connects with a port 21. leading to chamber 22 in cap 6. A port or passage 23 extends axially through the piston stem 7, opening through the side of said stem inside of the chamber 2?. and ex tends through-the piston 8 so as to deliver the. steam or air beyond said piston into the chamber 30. The end of the tube 4 is provided with a series of ports or openings 24, which lead outwardly from the chamber 30, and through which thesteanrof air introduced through the piston S'esapes, preferably somewhat tangentially or spirally, and thereby induces a sufficient velocity of the gases to draw in the required amount of air for securing the proper mixture of gas and air.

In Fig. 3 the port or passage 23 through piston stem 7 communicates'in thepistcn 8 with a series of radially and outwardly extending passages or ports 25 opening into the spiral grooves 14 in the face of said piston near the inner ends of said grooves. The effect of the steam or compressed air in this case is to impart a higher velocity to the gas escaping through the spiral grooves 14:, which results in drawing into the mixing tube the requisite amount of air.

Figs. 5 and 6 illustrate the simplest form ',of the invention. In this case the fuel tube 4 is closed at its inner end by suitable means, such as the cap 27, and is provided with a series of ports or perforatii'ins 12 which extend through said walls at an in.- clination to the longitudinal axis of the tube and also to the transverse plane of the tube, so as to impart to the gas the requisite spiral motioiu. The regulating piston is omitted, and instead the supply pipe 5 is provided with a regulating valve 28.

\ In all of these forms of the invention the gas is preferably given a spiral or whirling outward motion, so as toinsure the thorough mixture thereof with the incoming air.

The air is drawn in by the action of the latin iston this insures the drawin into a a the mixing tube of a sufficient quantity of 'air to produce perfect combustion.

'What I claim is:

1. A fuel burner comprising a hollow body constituting an air tube or mixing chamber, a fuel tube insaid hollow body provided through its side walls with a plurality of series of circumferentialiy spaced perforations arranged longitudinally of the tube and each perforation directing the gas spirally along the tube, and means for covcring and uncovering said several series of perforations to control the volume of fuel admitted through the said tube.

2. A fuel burner comprising a hollow body open at both ends and constituting an air tube or mixing chamber, and a fuel tube in said hollow body having a chamber at its sages through its side walls arranged at an angle to both the radius and the axis of the air tube or mixing chamber.

3. A. fuel burner comprising a hollow body constituting an air tube or mixing chamber, a fuel tube in said hollow body and'provided with a plurality of series of circumferentially spaced ports'or passages through its side walls arranged at an angle to both the radius and the axis of the tube, a piston closing the inner end of said fuel tube, and means for moving said piston. in said fuel tube to cover and uncover said several series of ports.

4. A fuel burner compri ing a fuel tube provided with a plurality ofports through lul its side walls, a piston in said tube, the walls of said tube being arranged 'to form a chamber in said tube in advance of the piston, means for moving said piston in said tube to cover or uncover the ports therein, said piston having a passage therethrough for supplying steam or compressed air to said chamber, and the walls of said fuel tube in advance of said piston being provided with ports through which the steam or compressed air escapes from said chamber.

' 5. A fuel burner comprising a fuel tube provided with a plurality of ports through its side walls, a piston closing said tube,

means for moving said piston in said tube to regulate the ports in the tube, a hollow rod or stem" extending from said piston, and means for connecting steam or compressed air to said rod or stem.

6. A fuel burner comprising a hollow body constituting an air tube or mixing chamber, a fuel tube projecting into said mixing chamber and provided with a plurality of ports or passages through its side walls, a piston closing said fuel tube, and a hollow rod or stem extending from said pis ton and through which steam or compressed air may be passed.

'7. A fuel burner comprising a fuel tube, and a piston fitting therein, one of said parts being provided with a plurality of ports or passages spaced circumferentially around the axis of said tube and arranged to give spiral movement to the fuel, said ports or passages having p'iirtiors thereof located in the contacting surfaces of said tube and piston and arranged when the piston is moved to be successively covered or uncovcred, means for moving the piston in the fuel tube to cover or uncover said ports or passages, and means including a port through said piston for supplying steam or compressed air therethrough.

S. A fuel'burner comprising a fuel tube having a plurality of longitudinally spaced series of ports or passages arranged circumferentially and to give sp ral movement to the fuel, a piston movable in said tube to I successively cover and uncover different series of ports or passages, and means for moving said piston in said tube.

9. A fuel burner comprising a tube and a piston therein, one of said parts being provided with ports or passages arranged to impart a spiral motion to the escaping fuel, said ports or passages being arran ed to be successively covered or uncovered as the piston is moved longitudinally, and means for adjusting said piston longitudinally in the tube to thereby vary the volume of fuel.

10. A fuel burner comprising a tube arranged at one end for connection to a fuel supply, and a piston at the other end of said tube, one of said parts being provided with ports or passages arranged to impart a spiral motion to the fuel, the open ends of-said ports or passages lying between the coop erating faces 0 operating faces of the piston and tube bein arranged so that when the piston is move longitudinally more or less of said ports or passages are uncovered, and means for adjuiting said piston longitudinally in said tu e.

11. A fuel burner comprising a tube ar ranged at one end for connection to a fuel the tube to successively cover or uncover" said ports or passages.

12. A fuel burner comprlsing a mixing the piston and tube, the cotube, a fuel tube projecting thereinto, a piston closing said fuel tube, said fuel tube and piston being formed to provide ports or passages arranged to impart a spiral motion to the fuel, the cotiperating faces of said tube and piston being arranged so that when the piston is moved in the tube said ports or passages are uncovered successively, and means for adjusting said piston longitudinally in said tube.

In testimony whereof, I have hereunto set my hand.

EMMER Y F. GWYNN. Witnesses F. W. Wfn'rnn, JAS. G. WnLnoN. 

